Lufft WS501 Compact Weather Sensor
The Lufft WS501 is a compact all-in-one weather sensor measuring air temperature, relative humidity, air pressure, wind speed/direction and solar irradiance, in a single WMO-compliant, aspirated unit with an integrated compass.
- Range
- -50 to 60 °C
- Output
- RS485 Modbus (SDI-12 optional)
- Ingress
- IP66
Overview
In detail
How it works
The WS501 combines temperature, humidity, air pressure, ultrasonic wind speed/direction and solar irradiance sensing behind an aspirated, heated radiation shield, giving WMO-compliant accuracy with no moving parts. Data processing is built in, and the sensor is rated -50 to +60°C for use in all climates. It is compliant to IEC 61724-1:2017 Class C.
Radiation & orientation
The built-in pyranometer measures solar irradiance up to 2000 W/m² across a 300-2800 nm spectral range with a response time under 18 seconds. An integrated compass reports orientation over 0-359° at 1.0° resolution, ±10° accuracy, sampled every 5 minutes.
Connectivity
Ships standard with RS485 Modbus communications; SDI-12 is available on request at time of order. The open protocol (UMB-Binary, UMB-ASCII, Modbus-RTU/ASCII, XDR, SDI-12) is compatible with most commercial Met/HydroMet dataloggers and PLC systems.
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Specifications
Technical specifications
- Range
- -50 to 60 °C
- Operating temperature
- -50 to 60°C (with heater)
- Accuracy
- ±0.2 °C (-20 to 50 °C), otherwise ±0.5 °C (>-30 °C)
- Ingress
- IP66
- Supply voltage
- 11-32 VDC standard (5-11 VDC reduced-accuracy mode); 24 VDC ±10% for heater
- Output
- RS485 Modbus (SDI-12 optional)
- Humidity range
- 0-100% RH
- Humidity accuracy
- ±2% RH
- Air pressure range
- 300-1200 hPa
- Air pressure accuracy
- ±0.5 hPa (0-40 °C)
- Wind speed range
- 0-75 m/s
Related
Often specified alongside
Weathertech
X-LAS MkII Scintillometer
- Path length
- 1 to 12 km
- Dimensions
- 1010 x 552 x 426 mm (with sunshield) 18,75 kg
- Wavelength
- 850 nm
- Range
- 0-100,000 µS/cm ±2%
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